engine YAMAHA WR 450F 2004 Owners Manual

4 - 97
ENGCRANKCASE AND CRANKSHAFT
5. Install:
Dowel pin 1
O-ring 2
Crankcase (right)
To crankcase (left).
NOTE:
Fit the crankcase (right) onto the crankcase
(left). Tap lightly on the case with soft ham-
mer.
When installing the crankcase, the connect-
ing rod should be positioned at TDC (top
dead center).
New
6. Tighten:
Hose guide 1
Clutch cable holder 2
Bolt (clutch cable holder)
Bolt (crankcase)
NOTE:
Tighten the crankcase tightening bolts in
stage, using a crisscross pattern.
7. Install:
Oil delivery pipe
O-ring
Bolt (oil delivery pipe 2)
8. Install:
Timing chain
Timing chain guide (rear)
Bolt (timing chain guide)
9. Remove:
Sealant
Forced out on the cylinder mating surface.
10. Apply:
Engine oil
To the crank pin, bearing and oil deliv-
ery hole.
11. Check:
Crankshaft and transmission operation.
Unsmooth operation → Repair.
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..12 Nm (1.2 m · kg, 8.7 ft · lb)
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)

4 - 98
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
TRANSMISSION, SHIFT CAM AND SHIFT FORK
TRANSMISSION, SHIFT CAM AND SHIFT FORK
Extent of removal:1 Shift fork, shift cam, main axle and drive axle removal
Extent of removal Order Part name Q’ty Remarks
TRANSMISSION, SHIFT CAM
AND SHIFT FORK REMOVAL
Preparation for removal Engine Refer to “ENGINE REMOVAL” section.
Separate the crankcase. Refer to “CRANKCASE AND CRANK-
SHAFT” section.
1 Shift fork 1 1
Refer to “REMOVAL POINTS”. 2 Shift fork 2 1
3 Shift fork 3 1
4 Shift cam 1
5 Main axle 1
6 Drive axle 1
7 Collar 1
1

4 - 102
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
5. Install:
Shift fork 1 (L) 1
Shift fork 2 (C) 2
Shift fork 3 (R) 3
Shift cam 4
To main axle and drive axle.
NOTE:
Apply the molybdenum disulfide oil on the
shift fork grooves.
Mesh the shift fork #1 (L) with the 4th wheel
gear 5 and #3 (R) with the 5th wheel gear 7
on the drive axle.
Mesh the shift fork #2 (C) with the 3rd pinion
gear 6 on the main axle.
6. Install:
Transmission assembly 1
To crankcase (left) 2.
NOTE:
Apply the engine oil on the bearings and guide
bars.
7. Check:
Shifter operation
Transmission operation
Unsmooth operation → Repair.

5 - 1
CHAS

EC500000
CHASSIS
EC590000
FRONT WHEEL AND REAR WHEEL
EC598000
FRONT WHEEL
FRONT WHEEL AND REAR WHEEL
Extent of removal:
1
Front wheel removal
2
Wheel bearing removal
3
Brake disc removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removal
FRONT WHEEL REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNING

Support the machine securely so there is no
danger of it falling over.
1 Trip meter cable 1
2 Hose cover 1
3 Bolt (brake hose holder) 2 Only loosening.
4 Bolt (axle holder) 4 Only loosening.
5 Nut (front wheel axle) 1
6 Front wheel axle 1
7 Front wheel 1
8 Trip meter gear unit 1
9 Collar 1
10 Oil seal 1
11 Bearing 2 Refer to “REMOVAL POINTS”.
12 Brake disc 1
2
31
3

5 - 2
CHAS

EC598100
REAR WHEEL
Extent of removal:
1
Rear wheel removal
2
Wheel bearing removal
3
Brake disc removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removal
REAR WHEEL REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNING

Support the machine securely so there is no
danger of it falling over.
1 Nut (rear wheel axle) 1
2 Rear wheel axle 1
3 Chain puller 2
4 Rear wheel 1 Refer to “REMOVAL POINTS”.
5 Collar 2
6 Driven sprocket 1
7 Oil seal 2
8 Circlip 1
9 Bearing 2 Refer to “REMOVAL POINTS”.
10Brake disc
1
2
31
3

FRONT WHEEL AND REAR WHEEL

5 - 11
CHASFRONT BRAKE AND REAR BRAKE
EC5A0000
FRONT BRAKE AND REAR BRAKE
EC5A8000
FRONT BRAKE
Extent of removal:1 Brake hose removal2 Caliper removal
3 Master cylinder removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalFRONT BRAKE REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNINGSupport the machine securely so there is nodanger of it falling over.
Drain the brake fluid. Refer to “REMOVAL POINTS”.
1 Hose cover 1
2 Brake hose holder 1
3 Bolt (brake hose holder) 2 Only loosening.
4 Union bolt 2
5 Brake hose 1
6 Pad pin plug 1 Remove when loosening the pad pin.
7 Pad pin 1 Loosen when disassembling the caliper.
8 Caliper 1
9 Brake lever 1
10 Master cylinder bracket 1
11 Master cylinder 1
2
3
1
3
2

5 - 12
CHAS
EC5A8100
REAR BRAKE
Extent of removal:1 Master cylinder removal2 Brake hose removal
3 Caliper removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalREAR BRAKE REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNINGSupport the machine securely so there is nodanger of it falling over.
Rear wheel Refer to “FRONT WHEEL AND REAR
WHEEL” section.
Drain the brake fluid. Refer to “REMOVAL POINTS”.
1 Brake pedal 1
2 Master cylinder 1
3 Brake hose holder 2
4 Union bolt 2
5 Brake hose 1
6 Pad pin plug 1 Remove when loosening the pad pin.
7 Pad pin 1 Loosen when disassembling the caliper.
8Caliper
1
3
1
321
FRONT BRAKE AND REAR BRAKE

5 - 27
CHASFRONT FORK
EC550000
FRONT FORK
Extent of removal:1 Front fork removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalFRONT FORK REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNINGSupport the machine securely so there is no
danger of it falling over.
Front wheel Refer to “FRONT WHEEL AND REAR
WHEEL” section.
Front caliper Refer to “FRONT BRAKE AND REAR
BRAKE” section.
Headlight
Handlebar Refer to “HANDLEBAR” section.
1 Protector 1
2 Brake hose holder 2
3 Pinch bolt (handle crown) 2 Only loosening.
4 Cap bolt 1Loosen when disassembling the front fork.
5 Pinch bolt (under bracket) 2 Only loosening.
6 Front fork 1
1

5 - 40
CHAS
EC5B0000
HANDLEBAR
Extent of removal:1 Handlebar removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalHANDLEBAR REMOVAL
Headlight
1 Hot starter cable 1 Disconnect at the lever side.
2 Hot starter lever holder 1
3 Clutch cable 1 Disconnect at the lever side.
4 Clutch lever holder 1 Disconnect the clutch switch lead.
5“ENGINE STOP” button 1 Disconnect the “ENGINE STOP” button
lead.
6 Master cylinder 1 Refer to “REMOVAL POINTS”.
7 Start switch 1 Disconnect the start switch lead.
8 Throttle cable cap 1
9 Throttle cable #2 (pushed) 1 Disconnect at the throttle side.
10 Throttle cable #1 (pulled) 1 Disconnect at the throttle side.
11 Grip (right) 1 Refer to “REMOVAL POINTS”.
12 Tube guide 1
13 Cover (grip cap) 1
14 Grip (left) 1 Refer to “REMOVAL POINTS”.
15 Handlebar holder (upper) 2
16 Handlebar 1
1
HANDLEBAR

5 - 40
CHAS
LENKER
Demontage-Arbeiten:1 Lenker demontieren
Demontage-ArbeitenReihen-
folgeBauteil Anz. Bemerkungen
Vorbereitung den AusbauLENKER DEMONTIEREN
Scheinwerfer
1 Heißstarterseilzug 1 Hebelseitig demontieren.
2 Heißstarter-Hebelhalter 1
3 Kupplungszug 1 Hebelseitig demontieren.
4 Kupplungshebel-Halterung 1 Die Kupplungsschalterleitung abtrennen.
5 Motorstoppschalter “ENGINE STOP”1 Die Motorstoppschalter-Kabelleitung “ENGINE
STOP” abtrennen.
6 Hauptbremszylinder 1 Siehe unter “AUSBAU”.
7 Startschalter 1 Die Starterschalterleitung abtrennen.
8 Gasseilzugkappe 1
9 Gaszug 2 1 Gasdrehgriffseitig demontieren.
10 Gaszug 1 1 Gasdrehgriffseitig demontieren.
11 Gasdrehgriff 1 Siehe unter “AUSBAU”.
12 Führungsrohr 1
13 Abdeckung (Griffkappe) 1
14 Lenkergriff (links) 1 Siehe unter “AUSBAU”.
15 Lenkerhalterung (oben) 2
16 Lenker 1
1
GUIDON
LENKER
MANILLAR
GUIDON
Organisation de la dépose:1 Dépose du guidon
Organisation de la dépose Ordre Nom de pièce QtéRemarques
Préparation pour la déposeDEPOSE DU GUIDON
Phare
1Câble de démarreur à chaud 1 Déconnecter du côté levier.
2 Support du levier de démarreur à chaud 1
3Câble d’embrayage 1 Déconnecter du côté levier.
4 Support de levier d’embrayage 1 Débrancher le fil du contacteur d’embrayage.
5 Bouton d’arrêt du moteur “ENGINE STOP”1Débrancher le fil du bouton “D’ARRÊT DE MOTEUR”.
6Maître-cylindre 1 Se reporter à “POINTS DE DEPOSE”.
7 Commutateur de démarrage 1 Débrancher le fil du contacteur de démarreur.
8 Capuchon de câble d’accélerateur 1
9Câble d’accélérateur 2 (serré)1Déconnecter du côté accélérateur.
10 Câble d’accélérateur 1 (tiré)1Déconnecter du côté accélérateur.
11 Poignée (droite) 1 Se reporter à “POINTS DE DEPOSE”.
12 Guide de tube 1
13 Cache (capuchon de la poignée des gaz) 1
14 Poignée (gauche) 1 Se reporter à “POINTS DE DEPOSE”.
15 Support de guidon (supérieur) 2
16 Guidon 1
1
MANILLAR
Alcance de la extracción:1 Extracción del manillar
Alcance de la extracción Orden Denominación de la pieza Cantidad Observaciones
Preparación para la extracciónEXTRACCIÓN DEL MANILLAR
Faro delantero
1 Cable de arranque en caliente 1 Desconectar en el lado de la palanca.
2 Soporte de la palanca de arranque en caliente 1
3 Cable del embrague 1 Desconectar en el lado de la palanca.
4 Soporte de la palanca del embrague 1 Desconecte el cable del interruptor del embrague.
5 Botón de parada del motor “ENGINE STOP”1 Desconecte el cable del botón de parada del motor
“ENGINE STOP”.
6 Cilindro principal 1 Consulte el apartado “PUNTOS DE EXTRACCIÓN”.
7 Interruptor de arranque 1 Desconecte el cable del interruptor de arranque.
8 Tapa del cable del acelerador 1
9 Cable del acelerador N˚2 (presionado) 1 Desconectar en el lado del acelerador.
10 Cable del acelerador N˚1 (flojo) 1 Desconectar en el lado del acelerador.
11 Empuñadura (derecha) 1 Consulte el apartado “PUNTOS DE EXTRACCIÓN”.
12 Guía del tubo 1
13 Cubierta (tapa de la empuñadura) 1
14 Empuñadura (izquierda) 1 Consulte el apartado “PUNTOS DE EXTRACCIÓN”.
15 Soporte del manillar (superior) 2
16 Manillar 1
1